-
1.
公开(公告)号:US20150326289A1
公开(公告)日:2015-11-12
申请号:US14573988
申请日:2014-12-17
Applicant: LG ELECTRONICS INC.
Inventor: Seunghan KIM , Sunam KIM
CPC classification number: H04B7/0456 , H04B7/0617 , H04B7/0619 , H04B7/0639 , H04B7/0854 , H04L5/0005 , H04L5/001 , H04L5/0023 , H04L5/0035 , H04L5/0048 , H04L5/14 , H04W16/28 , H04W88/08
Abstract: A method is provided for transmitting a downlink signal by a base station with an antenna array including a plurality of antenna elements in a wireless communication system. The downlink signal is precoded using a precoding matrix for the antenna array. The precoded downlink signal is transmitted to a user equipment (UE). Each element of the precoding matrix is expressed by ∑ n = 1 N A n j { ( n - 1 ) kd cos θ + φ n } , where A n = ( N - 1 ) ! ( N - n ) ! ( n - 1 ) ! , N denotes a number of antenna elements, n denotes an index of each of the antenna elements corresponding to 1 to N−1, k denotes a propagation constant, d denotes a distance between the antenna elements, θ denotes an azimuth, φ n ( y n ) = φ set ( 2 y n ( N - 1 ) d ) 2 , yn=(n−(N+1)/2)d, φset, denotes a phase value to be applied to an antenna array 1, “!” denotes a symbol of factorial operations, and N! denotes a factorial of a non-negative integer N which is equal to a product of all positive integers less than or equal to N.
Abstract translation: 提供了一种用于在无线通信系统中由包括多个天线元件的天线阵列的基站发送下行链路信号的方法。 使用用于天线阵列的预编码矩阵对下行链路信号进行预编码。 预编码的下行链路信号被发送到用户设备(UE)。 预编码矩阵的每个元素由Σn = 1表示。(n-1)kdcos;;;; +&phgr n},其中,A n =(N-1)! (N - n)! (n - 1)! N表示天线元件数,n表示与1〜N-1对应的每个天线元件的索引,k表示传播常数,d表示天线元件之间的距离。 表示方位角 n(y n)=&phgr; 设置(2)y(N-1)d)2,yn =(n-(N + 1)/ 2)d,&phgr; set,表示应用于天线阵列1的相位值。 “表示阶乘运算的符号,而N! 表示非负整数N的阶乘,其等于小于或等于N的所有正整数的乘积。